Flat and Plumb

Opposite meaning words

Flat adjective - Being neither more nor less than a certain amount, number, or extent.

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Plumb is an antonym for flat.

Nearby Words: flatter, flatly, flatness, flatlet, flatting

Plumb adjective - Rising straight up.

Usage example: the wall was not plumb, so everything else in the room was out of kilter

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Flat is an antonym for plumb in vertical topic.

Nearby Words: plumbed, plumbing, plumber, plumbic, plumbery

Cite this Source

Plumb and Flat. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/flat/plumb

Flat & Plumb. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/flat/plumb>.

Plumb or Flat. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/flat/plumb.

Google Ngram Viewer shows how "flat" and "plumb" have occurred on timeline